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Research Article

Analytical quantification of the impact of sub-slab gravel layer on the airflow from soil into building substructures

Thierno M.O. Diallo1( )Bernard Collignan2Francis Allard3
School of Engineering, University of Hull, Cottingham Rd, Hull HU6 7RX, UK
CSTB Health Division, 84 avenue Jean-Jaurès, 77447 Marne-la-Vallée, France
University of La Rochelle (LaSIE, UMR CNRS 7356), Avenue Michel Crépeau, 17042 La Rochelle, France
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Abstract

The entry of soil gas pollutants into buildings has been the subject of many studies and some analytical airflow models have been developed to estimate this entry into buildings. The existing airflow models do not include the sub-slab gravel layer that can influence significantly the airflow from soil into buildings. In this paper, an analytical airflow model, which considers this sub-slab gravel layer has been developed. Moreover, a 2D finite-element model has been used for numerical comparison. This comparison gave a satisfactory agreement with the analytical model. The airflow model is presented as flow-pressure equation and can be integrated easily in vapour intrusion models or ventilation models to enable the quantification of the impact of these pollutants on indoor air quality.

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Building Simulation
Pages 155-163
Cite this article:
Diallo TM, Collignan B, Allard F. Analytical quantification of the impact of sub-slab gravel layer on the airflow from soil into building substructures. Building Simulation, 2018, 11(1): 155-163. https://doi.org/10.1007/s12273-017-0375-y

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Received: 03 February 2017
Revised: 28 March 2017
Accepted: 13 April 2017
Published: 19 May 2017
© Tsinghua University Press and Springer-Verlag GmbH Germany 2017
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